Tubular lantern.



w. McARTHUR In.

TUBULAR LANTERN. APPLICATION FILED MN. 11. I914.

1,21 8,428. Patented Mar. 6, 1917.

(E E9 63) E E A9 I v WOOD/0700000 [wmfa'r 14 #a/weya WAR-BEN MoARTI-LUR,an, or onrcaeo', :rnnmlors Assfenoa To a. E. IDIETZ CQMPANY,

A ooaroaarron or NEW YORK. j

TUBULAR LANTERN.

Specification of Letters Patent.

Patented Mar. 6, 1917.

Application filed January 17, 1914. SerialNo. 812,695.

1 '0 all whom it may concern:

Be it known that I, VARREN MoAa'rirUn, Jr., a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented a new and useful the construction of themetallic chimney and connecting parts with a view of reducing the heightof the lantern without -impairing its burning qualities, and ofrendering the lantern more convenient in operation.

In the accompanying drawings:

Figure 1 is a front elevation of a tubular lantern provided with theseimprovements.

Fig. 2 is a side elevation of the lantern showing the globe tilted back.

Fig. 3 is a fragmentary sectional elevation, on an enlarged scale, ofthe upper portion of a lantern at right anglesto Fig. 1.

Fig. 4 is a similar view showing a modified construction of the metallicchimney.

Fig. 5 is a fragmentary sideelevation of the lantern top partly insection, showing a modified construction of the upper end of thechimney.

10 represents the oil font, 11 the lower air chamber, 12 the tubes and13 the upper air chamber, allof any suitable construction.

14 represents the globe which rests upon the usual plate 15 and isdetachably held thereon by the wire guard 16, or any other suitableholding device. The globe plate may be hinged to the lower part of thelantern frame so that it can be tilted back with the globe when thechimney is raised, as represented in Fig. 2.

17 represents the cylindrical portion of the metallic chimney which isvertically movable in the upper portion of the lantern frame, and 18represents the base flange of the chimney which bears upon the globewhen the latter is in its normal position.

This base flange is substantially flat or horizontal, forming a flatcover for the upper end of the globe, and the cylindrical portion of thechimney rises centrally from this flat base flange.

The base flange rests with its marginal portion 19 upon the globe andfor the purpose of enabling the chimney and the globe to readily centerthemselves on each other upon lowering the chimney, the marginal portionofthe base'flange is constructed to enter the globe, for instance, asrepresented in Fig. 3, where the marginal portion ofthe base flange isshown as being provided on its under side with a depending annular lip20 which enters the globe. If desired, the base flange may beconstructed on the under side of its marginal portion with an annulardepression 21, Fig. 4, by means of which the flange engages the upperend of the globe.

22 represents the transverse lifter shaft which is journaled on theupper portion of the lantern frame and passes through slots 23 in thecylindrical portion 17 of the chimney. These slots are preferablyarranged near the base flange.

The flat baseflange is to a certain extent yielding or springy andyields to the pressure of the lifter shaft in seating the base flangeupon the globe and the latter upon theglobeplate by means ofv the liftershaft. This spring action of the base flange serves to h oldthe liftershaft securely. in the locked position and also enablesthe parts toadapt themselves within certain limits to globes of different heights,the globes differing often in this respect by reason of imper fectionsin their manufacture.

Thesubstantially flat form of the base flange of the chimney permits theflange to be raisedclosely underneath the upper air chamber of thelantern, thereby reducing the height of the space which is requiredbetween the globe and the upper air chamber for the movements of thechimney and" its base flange. This also reduces the distance to whichthe chimney extends'below the upper air chamber or lantern to wherebythe height of the lantern is greatly reduced without, however, impairingthe burning qualities of the lantern as the flare chamber formed by theglobe and the base flange" of the chimney is of ample capacity.

The flat base flange can be more readily drawn from sheet metal than atapering bell, such as is shown in my former patent.

By reducing the height of the lantern several important advantages aregained, among which are reduction of cost of production, reduction ofthe weight of the lanterns and of the size of the packages in which thelanterns are packed for shipment,

reduction of the cost of handling and ship ping the lanterns, andreduction of the space required for storing the lanterns in factories,warehouses and stores.

The upper end of the chimney is preferably higher on the front side thanon the rear side so that the chimney can yield upwardly slightly on therear side of the lantern if it should be struck by the globe as thelatter is swung forwardly from the tilted position shown in Fig. 2, tothe normal position. For that purpose the upper end of the chimney canbe made oblique or inclined, as represented at 2a in Fig. 3, or it canbe provided on the front side with an upward projection 25, asrepresented in Fig. 5. The upwardly projecting front portion of thechimney arrests the upward movement of the chimney, as the latter israised, by striking against a portion 26 in the lantern top, but leavesthe rear portion of the chimney free to be raised and the chimney to beslightly tilted if the globe should strike against the base flange ofthe chimney in being swung forwardly and upwardly toward its normalposition, thereby preventing the movement of the globe from beinginterfered with by the chimney.

I claim as my invention:

1. In a tubular lantern, the combination of a tubular lantern frame, aglobe support, a globe resting thereon, a metallic chimney which ismovable toward and from the globe and comprises a substantially flatbase flange of yielding material to conform to the size and shape of theglobe .which bears with its marginal portion upon the globe, and acranked transverse lifter shaft journaled in said frame, said shaftengaging the chimney above said base flange and having an operatinghandle at one side of the lantern.

2. The combination with a tubular lantern frame comprising an upper airchamber, a hinged globe support and a globe resting thereon, of ametallic chimney having the upper end thereof located within the airchamber, the said chimney being movable bodily in a substantiallyvertical direction toward and from the globe and relatively to the airchamber and being provided with means for arresting the up ward movementof the chimney at the front side, leaving the rear portion of thecl1i111- ney free to be raised by a slight tilting movement of thechimney.

3. The combination with a tubular lantern frame, a hinged globe support,and a globe resting thereon, of a metallic chimney which is movable insaid frame toward and from the globe and which is higher at the frontside than at the rear, and a stop in the frame which limits the upwardmovement of the chimney at the front side.

4:. In a tubular lantern, the combination of a tubular lantern framecomprising an upper and a lower air chamber, a globe support, a globeresting thereon, a metallic chimney which is movable toward and from theglobe and comprises a substantially flat base flange which bears withits marginal portion upon the globe and-ismade of yielding materialwhereby the ba'se fiange conforms to variations in size and form ofglobes, and a cranked transverse lifter shaft between said flange andthe upper air chamber.

Witness my hand in the presence of two subscribing witnesses.

WARREN MGABTHUR, JR.

Witnesses:

F. P. l/VAT'rs, W. L. HooHsoHILD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

